UPDATE: Postgame quotes after Bumgarner, SF Giants lose

UPDATE, 11:25 p.m.: There’s not much to add, quote-wise or note-wise, to the game story I filed right at game’s end.

Madison Bumgarner reacts after giving up a three-run home run to the San Diego Padres at AT&T Park on April 28. (Photo by Ezra Shaw/Getty Images)

Madison Bumgarner acknowledged what we can see, that his command has been off.

“I wasn’t able to make pitches today,” he said. “I left a lot of balls over the middle. I felt today was the worst game I had command-wise.”

Manager Bruce Bochy said he would sleep on some potential lineup changes, particularly with Brandon Belt and Pablo Sandoval, against left-hander Eric Stults on Tuesday. But Bochy also said in the long run the Giants’ success will hinge on both of these guys hitting.

“Our corner guys, they’re going to have to get on track for us to have any success,” Bochy said.

My early game story:

By Henry Schulman

Count Madison Bumgarner among the Giants who did not have the April they expected. Touted by many as a Cy Young favorite, he has been hit hard.

The latest toll was five runs (four earned) in Monday night’s 6-4 loss to the Padres, which ended the Giants win streak at four. They have lost three of four to San Diego this year.

Bumgarner, who threw a 97-pitch, eight-inning complete game in a loss at Colorado last week, was gone after 93 pitches in five innings Monday. He allowed a season-high five runs (four earned), all produced by catcher Rene Rivera on a two-run double and three-run homer.

Bumgarner walked four, also a season high.

The two-run rally in the fourth inning began with Brandon Crawford’s first error of the season on a Tommy Medica groundball.

After posting the fifth-lowest opponents’ batting average in the majors last season, at .203, they are drilling him at .310 this year.

The Giants had a 3-2 lead in the fifth when Rivera homered to give the Pads a 5-3 lead.

Brandon Hicks’ second homer in two games closed it to 5-4 in the bottom half, but the Giants did not score again, and Hicks’ throw to the wrong side of the plate on a ninth-inning Alexi Amarista grounder let the Padres’ sixth run score.

With two outs in the sixth, Hicks came within a few feet of a five-RBI night, but his high fly to left with the bases loaded was caught at the fence.

The Giants played their 15th consecutive game with two or fewer hits with runners in scoring position.

The big project before the game was a high-level round of extra batting practice for Brandon Belt, who was 0-for-13 with 10 strikeouts since his seventh-inning homer in Colorado on Wednesday. Watching and advising were manager Bruce Bochy, hitting coach Hensley Meulens and Will Clark.

Belt struck out once in four trips but went hitless.

“It’s been awhile since I haven’t been able to hit fastballs right down the middle,” Belt said. “I wish it didn’t happen. I wish I could cut down on strikeouts and put the ball in play, but I know how to deal with it. I’ve been through it before.”

Bochy left Belt in the third spot in the lineup and said he saw nothing in Belt’s body language to suggest the first baseman has let this get to his head.

“You really have to watch the player and see how he handles it,” Bochy said. “It’s not easy. I’m sure he’s frustrated. He’s down a little at times. Yet he goes out there and plays great defense for us. That’s why I’m going to throw him out there tonight.

“He’s our first baseman. He’s our best first baseman. He’s going to be out there for the most part.”

The Giants faced Berkeley-born Tyson Ross for the second time this season.

When Ross blanked the Giants for eight innings in San Diego last week, the Giants averted a shutout with a Belt homer in the ninth against Huston Street, not enough to prevent a 2-1 defeat.

Ross had a 12-inning shutout streak against the Giants until the fourth, when Angel Pagan hit a leadoff single and Hunter Pence tripled him home.

Belt walked then made a huge contribution with his legs, advancing on a wild pitch that bounced barely 4 feet in front of the plate. That allowed two runs to score when Michael Morse grounded a single through the middle, giving the Giants a 3-2 lead and Morse a team-leading 19 RBIs.

Each manager successfully challenged an Angel Hernandez call at first base. Neither figured in the scoring. Bochy improved to 4-1 on replays.

Tommy John for Williamson: Outfielder Mac Williamson, who hit 25 home runs for Class A San Jose last year, has a torn ulnar-collateral ligament in his throwing arm and will undergo Tommy John reconstructive surgery Tuesday. Dr. James Andrews will perfom the procedure.

This is a blow for the Giants because Williamson is a rarity in their system, an outfielder with power.

The recovery typically is shorter than a pitcher’s. Outfielder Carl Crawford had the surgery in August, 2012, when he played for Boston, but less than eight months later he made the Dodgers’ Opening Day roster.

Williamson, 23, had the injury in spring training and returned to San Jose so he could be the designated hitter every day. He hit .318 with three home runs this month before he went on the disabled list late last week.